Crushing-mill



(NO MD deL) F. A. HUNTINGTON.

URUSHING-MILL.

Patented Mar. 1'7, 1896.

M. PnOTOuTnO. wAs H IN GTO UNITED STATES PATENT OFFICE.

FRANK A. HUNTINGTON, OF OAKLAND, CALIFORNIA.

CRUSHlNG-MILL.

SPECIFICATION forming part of Letters Patent No. 556,466, dated March 17, 1896.

Application filed April 4,1895. Serial No. 544,464. (No model.)

To all whom it may concern:

Beit known that I, FRANK A. HUNTINGTON, a citizen of the United States, residing in Oakland, county of Alameda, State of California, have invented an Improvement in Crushing- Mills; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to that class of mills for crushing and grinding materials, especially ores; and my invention consists of the construction, arrangement and combination of parts which I shall hereinafter fully describe and specifically claim.

Referring to the accompanying drawing for a more complete explanation of my invention, the figure is an elevation of my crushing-mill, a portion of it being shown in section.

A is a pan having side screens B and central cone O. In the pan is the inclined die a, the angle of which may be varied, though I prefer and have shown an angle of about forty-five degrees.

Around the spindle D, rising from cone C, is fitted and adapted to revolve a driver E, operated by the sleeve F having the driving pulley f.

G is the crushing-roller having a wearingshoe There may be one or more of these rollers. They are mounted at an inclination upon axes which are parallel with the plane of the inclined surface of the crushing-die a, and they are adapted to move bodily to and from the die in a plane at right angles thereto, whereby they crush and grind the ore with a force due to their weight and to centrifugal action, and yield to accommodate themselves to inequalities and obstructions in the orebed. The means I employ to mount the rollers are as follows:

The driver E is formed or provided with downwardly and outwardly extending hangers e, to the extremities of which are freely pivoted the arms 6, in the other ends of which are secured the axles or pins g, upon which the rollers are mounted. Rigid guide-bars c extend downwardly from the driver E and lie just outside the swinging arms e, whereby said arms are held and steadied against the outward tendency of the rollers due to centrifugal action. The rollers are also held and guarded by making the die and the shoe of From this hopper extends downwardly a delivery-chute h, one in front of each roller used. Ordinarily the ore is fed to the mill from a stationary hopper. This is disadvantageous in that the material being supplied at the same point all the time causes undue wear at that place; but by having the hopper mounted on the driver and providing it with one or more delivery-chutes, according to the number of rollers, the ore is distributed and is fed in such a manner that neither the rollers nor the die are subjected to unequal wear.

A suitable scraper or scrapers I depend from the driver E.

The inner surface of the end of swinging arm 6 is recessed or chambered out, as at 6 and into this extends a flange g of the roller hub or center, and by this overlapping fully protects the journal from dirt. The head of pin or axle g is fitted in a chamber or socket g on the inner side of the roller and is protected and the oil is kept in by a cap bolted to the roller.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a roller crushing-mill having a crushing-bed and a roller, a means for mounting the roller consisting of an arm extending from the driver to a point forward of the tread of the roller, and an arm carrying the roller, projecting beyond the tread thereof and pivotally hung upon the lower end of the hanger whereby the roller may move to and from the crushing-bed, and a bar from the driver passin g outside of the roller-carrying arm for holding and steadying the arm against the outward tendency of the roller due to centrifugal action.

2. In a roller crushing-mill having an inclined crushing-bed and a roller mounted on an axis parallel with the plane of the bed,

the means for mounting said roller so that it may move to and from the crushing-bed in a plane at right angles thereto, consisting of the hanger extending from the driver, the arm pivoted to and swinging from said hanger and carrying the roller at its other end, and the fixed guide-bar extending from the driver and passing outside of the swinging arm.

a crushing-roller, a driver and means for operating the same, and arms connecting the roller with the driver, of a fixed guide-bar extending from the driver and passing outside of the roller-carrying arm whereby said roller-carrying arm is held against the outward tendency of the roller due to centrifugal action.

4. A crushing-mill comprising an inclined bed, a series of inclined crushing-rollers, an arm extending from the axis of each roller in the direction in which the roller advances, and projecting beyond the tread of the roller, a driver having fixed to it depending hangers to which the forward ends of the arms are pivotally hung other arms extending from The combination, with a crushing-bed,

the driver passing just outside of the swinging arms to steady the rollers against the outward tendency of the same due to centrifugal action, a feed-hopper carried by the driver and having multiple delivery chutes an d means for operating the driver.

5. 'A roller crushing-mill comprising an inclined crushing bed, a series of rollers mounted on an aXis parallel with the plane of the bed, a rotating driver having a series of hangers secured to it and each extending forwardly to a point in advance of its roller, arms extending from the axis of the rollers to a point in front of the rollers and pivotally connected with the hangers, rigid guides for the arms and a feed-hopper having multiple delivery-chutes one of which delivers directly in front of each roller.

In witness whereof I have hereunto set my hand.

FRANK A. lIUN'llNGlON.

\Vitnesses LEE D. CRAIG, Gno. II. STRONG. 

